2 * WPA/RSN - Shared functions for supplicant and authenticator
3 * Copyright (c) 2002-2015, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
12 #include "crypto/md5.h"
13 #include "crypto/sha1.h"
14 #include "crypto/sha256.h"
15 #include "crypto/sha384.h"
16 #include "crypto/aes_wrap.h"
17 #include "crypto/crypto.h"
18 #include "ieee802_11_defs.h"
20 #include "wpa_common.h"
23 static unsigned int wpa_kck_len(int akmp)
25 if (akmp == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
31 static unsigned int wpa_kek_len(int akmp)
33 if (akmp == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
39 unsigned int wpa_mic_len(int akmp)
41 if (akmp == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
48 * wpa_eapol_key_mic - Calculate EAPOL-Key MIC
49 * @key: EAPOL-Key Key Confirmation Key (KCK)
50 * @key_len: KCK length in octets
51 * @akmp: WPA_KEY_MGMT_* used in key derivation
52 * @ver: Key descriptor version (WPA_KEY_INFO_TYPE_*)
53 * @buf: Pointer to the beginning of the EAPOL header (version field)
54 * @len: Length of the EAPOL frame (from EAPOL header to the end of the frame)
55 * @mic: Pointer to the buffer to which the EAPOL-Key MIC is written
56 * Returns: 0 on success, -1 on failure
58 * Calculate EAPOL-Key MIC for an EAPOL-Key packet. The EAPOL-Key MIC field has
59 * to be cleared (all zeroes) when calling this function.
61 * Note: 'IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames' has an error in the
62 * description of the Key MIC calculation. It includes packet data from the
63 * beginning of the EAPOL-Key header, not EAPOL header. This incorrect change
64 * happened during final editing of the standard and the correct behavior is
65 * defined in the last draft (IEEE 802.11i/D10).
67 int wpa_eapol_key_mic(const u8 *key, size_t key_len, int akmp, int ver,
68 const u8 *buf, size_t len, u8 *mic)
70 u8 hash[SHA384_MAC_LEN];
74 case WPA_KEY_INFO_TYPE_HMAC_MD5_RC4:
75 return hmac_md5(key, key_len, buf, len, mic);
76 #endif /* CONFIG_FIPS */
77 case WPA_KEY_INFO_TYPE_HMAC_SHA1_AES:
78 if (hmac_sha1(key, key_len, buf, len, hash))
80 os_memcpy(mic, hash, MD5_MAC_LEN);
82 #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W)
83 case WPA_KEY_INFO_TYPE_AES_128_CMAC:
84 return omac1_aes_128(key, buf, len, mic);
85 #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */
86 case WPA_KEY_INFO_TYPE_AKM_DEFINED:
89 case WPA_KEY_MGMT_OSEN:
90 return omac1_aes_128(key, buf, len, mic);
91 #endif /* CONFIG_HS20 */
93 case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
94 if (hmac_sha256(key, key_len, buf, len, hash))
96 os_memcpy(mic, hash, MD5_MAC_LEN);
98 #endif /* CONFIG_SUITEB */
99 #ifdef CONFIG_SUITEB192
100 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
101 if (hmac_sha384(key, key_len, buf, len, hash))
103 os_memcpy(mic, hash, 24);
105 #endif /* CONFIG_SUITEB192 */
119 * wpa_pmk_to_ptk - Calculate PTK from PMK, addresses, and nonces
120 * @pmk: Pairwise master key
121 * @pmk_len: Length of PMK
122 * @label: Label to use in derivation
125 * @nonce1: ANonce or SNonce
126 * @nonce2: SNonce or ANonce
127 * @ptk: Buffer for pairwise transient key
128 * @akmp: Negotiated AKM
129 * @cipher: Negotiated pairwise cipher
130 * Returns: 0 on success, -1 on failure
132 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
133 * PTK = PRF-X(PMK, "Pairwise key expansion",
134 * Min(AA, SA) || Max(AA, SA) ||
135 * Min(ANonce, SNonce) || Max(ANonce, SNonce))
137 * STK = PRF-X(SMK, "Peer key expansion",
138 * Min(MAC_I, MAC_P) || Max(MAC_I, MAC_P) ||
139 * Min(INonce, PNonce) || Max(INonce, PNonce))
141 int wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label,
142 const u8 *addr1, const u8 *addr2,
143 const u8 *nonce1, const u8 *nonce2,
144 struct wpa_ptk *ptk, int akmp, int cipher)
146 u8 data[2 * ETH_ALEN + 2 * WPA_NONCE_LEN];
147 u8 tmp[WPA_KCK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN];
150 if (os_memcmp(addr1, addr2, ETH_ALEN) < 0) {
151 os_memcpy(data, addr1, ETH_ALEN);
152 os_memcpy(data + ETH_ALEN, addr2, ETH_ALEN);
154 os_memcpy(data, addr2, ETH_ALEN);
155 os_memcpy(data + ETH_ALEN, addr1, ETH_ALEN);
158 if (os_memcmp(nonce1, nonce2, WPA_NONCE_LEN) < 0) {
159 os_memcpy(data + 2 * ETH_ALEN, nonce1, WPA_NONCE_LEN);
160 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce2,
163 os_memcpy(data + 2 * ETH_ALEN, nonce2, WPA_NONCE_LEN);
164 os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce1,
168 ptk->kck_len = wpa_kck_len(akmp);
169 ptk->kek_len = wpa_kek_len(akmp);
170 ptk->tk_len = wpa_cipher_key_len(cipher);
171 ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len;
173 #ifdef CONFIG_SUITEB192
174 if (wpa_key_mgmt_sha384(akmp))
175 sha384_prf(pmk, pmk_len, label, data, sizeof(data),
178 #endif /* CONFIG_SUITEB192 */
179 #ifdef CONFIG_IEEE80211W
180 if (wpa_key_mgmt_sha256(akmp))
181 sha256_prf(pmk, pmk_len, label, data, sizeof(data),
184 #endif /* CONFIG_IEEE80211W */
185 sha1_prf(pmk, pmk_len, label, data, sizeof(data), tmp, ptk_len);
187 wpa_printf(MSG_DEBUG, "WPA: PTK derivation - A1=" MACSTR " A2=" MACSTR,
188 MAC2STR(addr1), MAC2STR(addr2));
189 wpa_hexdump(MSG_DEBUG, "WPA: Nonce1", nonce1, WPA_NONCE_LEN);
190 wpa_hexdump(MSG_DEBUG, "WPA: Nonce2", nonce2, WPA_NONCE_LEN);
191 wpa_hexdump_key(MSG_DEBUG, "WPA: PMK", pmk, pmk_len);
192 wpa_hexdump_key(MSG_DEBUG, "WPA: PTK", tmp, ptk_len);
194 os_memcpy(ptk->kck, tmp, ptk->kck_len);
195 wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", ptk->kck, ptk->kck_len);
197 os_memcpy(ptk->kek, tmp + ptk->kck_len, ptk->kek_len);
198 wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", ptk->kek, ptk->kek_len);
200 os_memcpy(ptk->tk, tmp + ptk->kck_len + ptk->kek_len, ptk->tk_len);
201 wpa_hexdump_key(MSG_DEBUG, "WPA: TK", ptk->tk, ptk->tk_len);
203 os_memset(tmp, 0, sizeof(tmp));
208 #ifdef CONFIG_IEEE80211R
209 int wpa_ft_mic(const u8 *kck, size_t kck_len, const u8 *sta_addr,
210 const u8 *ap_addr, u8 transaction_seqnum,
211 const u8 *mdie, size_t mdie_len,
212 const u8 *ftie, size_t ftie_len,
213 const u8 *rsnie, size_t rsnie_len,
214 const u8 *ric, size_t ric_len, u8 *mic)
218 size_t i, num_elem = 0;
222 wpa_printf(MSG_WARNING, "FT: Unsupported KCK length %u",
223 (unsigned int) kck_len);
227 addr[num_elem] = sta_addr;
228 len[num_elem] = ETH_ALEN;
231 addr[num_elem] = ap_addr;
232 len[num_elem] = ETH_ALEN;
235 addr[num_elem] = &transaction_seqnum;
240 addr[num_elem] = rsnie;
241 len[num_elem] = rsnie_len;
245 addr[num_elem] = mdie;
246 len[num_elem] = mdie_len;
250 if (ftie_len < 2 + sizeof(struct rsn_ftie))
253 /* IE hdr and mic_control */
254 addr[num_elem] = ftie;
255 len[num_elem] = 2 + 2;
258 /* MIC field with all zeros */
259 os_memset(zero_mic, 0, sizeof(zero_mic));
260 addr[num_elem] = zero_mic;
261 len[num_elem] = sizeof(zero_mic);
265 addr[num_elem] = ftie + 2 + 2 + 16;
266 len[num_elem] = ftie_len - (2 + 2 + 16);
270 addr[num_elem] = ric;
271 len[num_elem] = ric_len;
275 for (i = 0; i < num_elem; i++)
276 wpa_hexdump(MSG_MSGDUMP, "FT: MIC data", addr[i], len[i]);
277 if (omac1_aes_128_vector(kck, num_elem, addr, len, mic))
284 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
285 struct wpa_ft_ies *parse)
290 parse->ftie_len = ie_len;
292 pos = ie + sizeof(struct rsn_ftie);
295 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
297 case FTIE_SUBELEM_R1KH_ID:
298 if (pos[1] != FT_R1KH_ID_LEN) {
299 wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID "
300 "length in FTIE: %d", pos[1]);
303 parse->r1kh_id = pos + 2;
305 case FTIE_SUBELEM_GTK:
306 parse->gtk = pos + 2;
307 parse->gtk_len = pos[1];
309 case FTIE_SUBELEM_R0KH_ID:
310 if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) {
311 wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID "
312 "length in FTIE: %d", pos[1]);
315 parse->r0kh_id = pos + 2;
316 parse->r0kh_id_len = pos[1];
318 #ifdef CONFIG_IEEE80211W
319 case FTIE_SUBELEM_IGTK:
320 parse->igtk = pos + 2;
321 parse->igtk_len = pos[1];
323 #endif /* CONFIG_IEEE80211W */
333 int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
334 struct wpa_ft_ies *parse)
337 struct wpa_ie_data data;
339 const struct rsn_ftie *ftie;
340 int prot_ie_count = 0;
342 os_memset(parse, 0, sizeof(*parse));
348 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
351 parse->rsn = pos + 2;
352 parse->rsn_len = pos[1];
353 ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
357 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
361 if (data.num_pmkid == 1 && data.pmkid)
362 parse->rsn_pmkid = data.pmkid;
364 case WLAN_EID_MOBILITY_DOMAIN:
365 if (pos[1] < sizeof(struct rsn_mdie))
367 parse->mdie = pos + 2;
368 parse->mdie_len = pos[1];
370 case WLAN_EID_FAST_BSS_TRANSITION:
371 if (pos[1] < sizeof(*ftie))
373 ftie = (const struct rsn_ftie *) (pos + 2);
374 prot_ie_count = ftie->mic_control[1];
375 if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0)
378 case WLAN_EID_TIMEOUT_INTERVAL:
381 parse->tie = pos + 2;
382 parse->tie_len = pos[1];
384 case WLAN_EID_RIC_DATA:
385 if (parse->ric == NULL)
393 if (prot_ie_count == 0)
394 return 0; /* no MIC */
397 * Check that the protected IE count matches with IEs included in the
406 if (prot_ie_count < 0) {
407 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
408 "the protected IE count");
412 if (prot_ie_count == 0 && parse->ric) {
413 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
414 "included in protected IE count");
418 /* Determine the end of the RIC IE(s) */
420 while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end &&
425 parse->ric_len = pos - parse->ric;
427 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
428 "frame", (int) prot_ie_count);
434 #endif /* CONFIG_IEEE80211R */
437 static int rsn_selector_to_bitfield(const u8 *s)
439 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NONE)
440 return WPA_CIPHER_NONE;
441 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_TKIP)
442 return WPA_CIPHER_TKIP;
443 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP)
444 return WPA_CIPHER_CCMP;
445 #ifdef CONFIG_IEEE80211W
446 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_AES_128_CMAC)
447 return WPA_CIPHER_AES_128_CMAC;
448 #endif /* CONFIG_IEEE80211W */
449 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP)
450 return WPA_CIPHER_GCMP;
451 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP_256)
452 return WPA_CIPHER_CCMP_256;
453 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP_256)
454 return WPA_CIPHER_GCMP_256;
455 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_128)
456 return WPA_CIPHER_BIP_GMAC_128;
457 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_256)
458 return WPA_CIPHER_BIP_GMAC_256;
459 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_CMAC_256)
460 return WPA_CIPHER_BIP_CMAC_256;
461 if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED)
462 return WPA_CIPHER_GTK_NOT_USED;
467 static int rsn_key_mgmt_to_bitfield(const u8 *s)
469 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_UNSPEC_802_1X)
470 return WPA_KEY_MGMT_IEEE8021X;
471 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X)
472 return WPA_KEY_MGMT_PSK;
473 #ifdef CONFIG_IEEE80211R
474 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X)
475 return WPA_KEY_MGMT_FT_IEEE8021X;
476 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_PSK)
477 return WPA_KEY_MGMT_FT_PSK;
478 #endif /* CONFIG_IEEE80211R */
479 #ifdef CONFIG_IEEE80211W
480 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA256)
481 return WPA_KEY_MGMT_IEEE8021X_SHA256;
482 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_SHA256)
483 return WPA_KEY_MGMT_PSK_SHA256;
484 #endif /* CONFIG_IEEE80211W */
486 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_SAE)
487 return WPA_KEY_MGMT_SAE;
488 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_SAE)
489 return WPA_KEY_MGMT_FT_SAE;
490 #endif /* CONFIG_SAE */
491 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B)
492 return WPA_KEY_MGMT_IEEE8021X_SUITE_B;
493 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192)
494 return WPA_KEY_MGMT_IEEE8021X_SUITE_B_192;
495 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_OSEN)
496 return WPA_KEY_MGMT_OSEN;
501 int wpa_cipher_valid_group(int cipher)
503 return wpa_cipher_valid_pairwise(cipher) ||
504 cipher == WPA_CIPHER_GTK_NOT_USED;
508 #ifdef CONFIG_IEEE80211W
509 int wpa_cipher_valid_mgmt_group(int cipher)
511 return cipher == WPA_CIPHER_AES_128_CMAC ||
512 cipher == WPA_CIPHER_BIP_GMAC_128 ||
513 cipher == WPA_CIPHER_BIP_GMAC_256 ||
514 cipher == WPA_CIPHER_BIP_CMAC_256;
516 #endif /* CONFIG_IEEE80211W */
520 * wpa_parse_wpa_ie_rsn - Parse RSN IE
521 * @rsn_ie: Buffer containing RSN IE
522 * @rsn_ie_len: RSN IE buffer length (including IE number and length octets)
523 * @data: Pointer to structure that will be filled in with parsed data
524 * Returns: 0 on success, <0 on failure
526 int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len,
527 struct wpa_ie_data *data)
533 os_memset(data, 0, sizeof(*data));
534 data->proto = WPA_PROTO_RSN;
535 data->pairwise_cipher = WPA_CIPHER_CCMP;
536 data->group_cipher = WPA_CIPHER_CCMP;
537 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
538 data->capabilities = 0;
541 #ifdef CONFIG_IEEE80211W
542 data->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
543 #else /* CONFIG_IEEE80211W */
544 data->mgmt_group_cipher = 0;
545 #endif /* CONFIG_IEEE80211W */
547 if (rsn_ie_len == 0) {
548 /* No RSN IE - fail silently */
552 if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) {
553 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
554 __func__, (unsigned long) rsn_ie_len);
558 if (rsn_ie_len >= 6 && rsn_ie[1] >= 4 &&
559 rsn_ie[1] == rsn_ie_len - 2 &&
560 WPA_GET_BE32(&rsn_ie[2]) == OSEN_IE_VENDOR_TYPE) {
562 left = rsn_ie_len - 6;
564 data->proto = WPA_PROTO_OSEN;
566 const struct rsn_ie_hdr *hdr;
568 hdr = (const struct rsn_ie_hdr *) rsn_ie;
570 if (hdr->elem_id != WLAN_EID_RSN ||
571 hdr->len != rsn_ie_len - 2 ||
572 WPA_GET_LE16(hdr->version) != RSN_VERSION) {
573 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
578 pos = (const u8 *) (hdr + 1);
579 left = rsn_ie_len - sizeof(*hdr);
582 if (left >= RSN_SELECTOR_LEN) {
583 data->group_cipher = rsn_selector_to_bitfield(pos);
584 if (!wpa_cipher_valid_group(data->group_cipher)) {
585 wpa_printf(MSG_DEBUG, "%s: invalid group cipher 0x%x",
586 __func__, data->group_cipher);
589 pos += RSN_SELECTOR_LEN;
590 left -= RSN_SELECTOR_LEN;
591 } else if (left > 0) {
592 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
598 data->pairwise_cipher = 0;
599 count = WPA_GET_LE16(pos);
602 if (count == 0 || count > left / RSN_SELECTOR_LEN) {
603 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
604 "count %u left %u", __func__, count, left);
607 for (i = 0; i < count; i++) {
608 data->pairwise_cipher |= rsn_selector_to_bitfield(pos);
609 pos += RSN_SELECTOR_LEN;
610 left -= RSN_SELECTOR_LEN;
612 #ifdef CONFIG_IEEE80211W
613 if (data->pairwise_cipher & WPA_CIPHER_AES_128_CMAC) {
614 wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as "
615 "pairwise cipher", __func__);
618 #endif /* CONFIG_IEEE80211W */
619 } else if (left == 1) {
620 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
627 count = WPA_GET_LE16(pos);
630 if (count == 0 || count > left / RSN_SELECTOR_LEN) {
631 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
632 "count %u left %u", __func__, count, left);
635 for (i = 0; i < count; i++) {
636 data->key_mgmt |= rsn_key_mgmt_to_bitfield(pos);
637 pos += RSN_SELECTOR_LEN;
638 left -= RSN_SELECTOR_LEN;
640 } else if (left == 1) {
641 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
647 data->capabilities = WPA_GET_LE16(pos);
653 u16 num_pmkid = WPA_GET_LE16(pos);
656 if (num_pmkid > (unsigned int) left / PMKID_LEN) {
657 wpa_printf(MSG_DEBUG, "%s: PMKID underflow "
658 "(num_pmkid=%u left=%d)",
659 __func__, num_pmkid, left);
663 data->num_pmkid = num_pmkid;
665 pos += data->num_pmkid * PMKID_LEN;
666 left -= data->num_pmkid * PMKID_LEN;
670 #ifdef CONFIG_IEEE80211W
672 data->mgmt_group_cipher = rsn_selector_to_bitfield(pos);
673 if (!wpa_cipher_valid_mgmt_group(data->mgmt_group_cipher)) {
674 wpa_printf(MSG_DEBUG, "%s: Unsupported management "
675 "group cipher 0x%x", __func__,
676 data->mgmt_group_cipher);
679 pos += RSN_SELECTOR_LEN;
680 left -= RSN_SELECTOR_LEN;
682 #endif /* CONFIG_IEEE80211W */
685 wpa_hexdump(MSG_DEBUG,
686 "wpa_parse_wpa_ie_rsn: ignore trailing bytes",
694 static int wpa_selector_to_bitfield(const u8 *s)
696 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE)
697 return WPA_CIPHER_NONE;
698 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP)
699 return WPA_CIPHER_TKIP;
700 if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP)
701 return WPA_CIPHER_CCMP;
706 static int wpa_key_mgmt_to_bitfield(const u8 *s)
708 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X)
709 return WPA_KEY_MGMT_IEEE8021X;
710 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X)
711 return WPA_KEY_MGMT_PSK;
712 if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE)
713 return WPA_KEY_MGMT_WPA_NONE;
718 int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len,
719 struct wpa_ie_data *data)
721 const struct wpa_ie_hdr *hdr;
726 os_memset(data, 0, sizeof(*data));
727 data->proto = WPA_PROTO_WPA;
728 data->pairwise_cipher = WPA_CIPHER_TKIP;
729 data->group_cipher = WPA_CIPHER_TKIP;
730 data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
731 data->capabilities = 0;
734 data->mgmt_group_cipher = 0;
736 if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) {
737 wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
738 __func__, (unsigned long) wpa_ie_len);
742 hdr = (const struct wpa_ie_hdr *) wpa_ie;
744 if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC ||
745 hdr->len != wpa_ie_len - 2 ||
746 RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE ||
747 WPA_GET_LE16(hdr->version) != WPA_VERSION) {
748 wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
753 pos = (const u8 *) (hdr + 1);
754 left = wpa_ie_len - sizeof(*hdr);
756 if (left >= WPA_SELECTOR_LEN) {
757 data->group_cipher = wpa_selector_to_bitfield(pos);
758 pos += WPA_SELECTOR_LEN;
759 left -= WPA_SELECTOR_LEN;
760 } else if (left > 0) {
761 wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
767 data->pairwise_cipher = 0;
768 count = WPA_GET_LE16(pos);
771 if (count == 0 || count > left / WPA_SELECTOR_LEN) {
772 wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
773 "count %u left %u", __func__, count, left);
776 for (i = 0; i < count; i++) {
777 data->pairwise_cipher |= wpa_selector_to_bitfield(pos);
778 pos += WPA_SELECTOR_LEN;
779 left -= WPA_SELECTOR_LEN;
781 } else if (left == 1) {
782 wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
789 count = WPA_GET_LE16(pos);
792 if (count == 0 || count > left / WPA_SELECTOR_LEN) {
793 wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), "
794 "count %u left %u", __func__, count, left);
797 for (i = 0; i < count; i++) {
798 data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos);
799 pos += WPA_SELECTOR_LEN;
800 left -= WPA_SELECTOR_LEN;
802 } else if (left == 1) {
803 wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)",
809 data->capabilities = WPA_GET_LE16(pos);
815 wpa_hexdump(MSG_DEBUG,
816 "wpa_parse_wpa_ie_wpa: ignore trailing bytes",
824 #ifdef CONFIG_IEEE80211R
827 * wpa_derive_pmk_r0 - Derive PMK-R0 and PMKR0Name
829 * IEEE Std 802.11r-2008 - 8.5.1.5.3
831 void wpa_derive_pmk_r0(const u8 *xxkey, size_t xxkey_len,
832 const u8 *ssid, size_t ssid_len,
833 const u8 *mdid, const u8 *r0kh_id, size_t r0kh_id_len,
834 const u8 *s0kh_id, u8 *pmk_r0, u8 *pmk_r0_name)
836 u8 buf[1 + SSID_MAX_LEN + MOBILITY_DOMAIN_ID_LEN + 1 +
837 FT_R0KH_ID_MAX_LEN + ETH_ALEN];
838 u8 *pos, r0_key_data[48], hash[32];
843 * R0-Key-Data = KDF-384(XXKey, "FT-R0",
844 * SSIDlength || SSID || MDID || R0KHlength ||
845 * R0KH-ID || S0KH-ID)
846 * XXKey is either the second 256 bits of MSK or PSK.
847 * PMK-R0 = L(R0-Key-Data, 0, 256)
848 * PMK-R0Name-Salt = L(R0-Key-Data, 256, 128)
850 if (ssid_len > SSID_MAX_LEN || r0kh_id_len > FT_R0KH_ID_MAX_LEN)
854 os_memcpy(pos, ssid, ssid_len);
856 os_memcpy(pos, mdid, MOBILITY_DOMAIN_ID_LEN);
857 pos += MOBILITY_DOMAIN_ID_LEN;
858 *pos++ = r0kh_id_len;
859 os_memcpy(pos, r0kh_id, r0kh_id_len);
861 os_memcpy(pos, s0kh_id, ETH_ALEN);
864 sha256_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf,
865 r0_key_data, sizeof(r0_key_data));
866 os_memcpy(pmk_r0, r0_key_data, PMK_LEN);
869 * PMKR0Name = Truncate-128(SHA-256("FT-R0N" || PMK-R0Name-Salt)
871 addr[0] = (const u8 *) "FT-R0N";
873 addr[1] = r0_key_data + PMK_LEN;
876 sha256_vector(2, addr, len, hash);
877 os_memcpy(pmk_r0_name, hash, WPA_PMK_NAME_LEN);
882 * wpa_derive_pmk_r1_name - Derive PMKR1Name
884 * IEEE Std 802.11r-2008 - 8.5.1.5.4
886 void wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id,
887 const u8 *s1kh_id, u8 *pmk_r1_name)
894 * PMKR1Name = Truncate-128(SHA-256("FT-R1N" || PMKR0Name ||
895 * R1KH-ID || S1KH-ID))
897 addr[0] = (const u8 *) "FT-R1N";
899 addr[1] = pmk_r0_name;
900 len[1] = WPA_PMK_NAME_LEN;
902 len[2] = FT_R1KH_ID_LEN;
906 sha256_vector(4, addr, len, hash);
907 os_memcpy(pmk_r1_name, hash, WPA_PMK_NAME_LEN);
912 * wpa_derive_pmk_r1 - Derive PMK-R1 and PMKR1Name from PMK-R0
914 * IEEE Std 802.11r-2008 - 8.5.1.5.4
916 void wpa_derive_pmk_r1(const u8 *pmk_r0, const u8 *pmk_r0_name,
917 const u8 *r1kh_id, const u8 *s1kh_id,
918 u8 *pmk_r1, u8 *pmk_r1_name)
920 u8 buf[FT_R1KH_ID_LEN + ETH_ALEN];
923 /* PMK-R1 = KDF-256(PMK-R0, "FT-R1", R1KH-ID || S1KH-ID) */
925 os_memcpy(pos, r1kh_id, FT_R1KH_ID_LEN);
926 pos += FT_R1KH_ID_LEN;
927 os_memcpy(pos, s1kh_id, ETH_ALEN);
930 sha256_prf(pmk_r0, PMK_LEN, "FT-R1", buf, pos - buf, pmk_r1, PMK_LEN);
932 wpa_derive_pmk_r1_name(pmk_r0_name, r1kh_id, s1kh_id, pmk_r1_name);
937 * wpa_pmk_r1_to_ptk - Derive PTK and PTKName from PMK-R1
939 * IEEE Std 802.11r-2008 - 8.5.1.5.5
941 int wpa_pmk_r1_to_ptk(const u8 *pmk_r1, const u8 *snonce, const u8 *anonce,
942 const u8 *sta_addr, const u8 *bssid,
943 const u8 *pmk_r1_name,
944 struct wpa_ptk *ptk, u8 *ptk_name, int akmp, int cipher)
946 u8 buf[2 * WPA_NONCE_LEN + 2 * ETH_ALEN];
950 u8 tmp[WPA_KCK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN];
954 * PTK = KDF-PTKLen(PMK-R1, "FT-PTK", SNonce || ANonce ||
958 os_memcpy(pos, snonce, WPA_NONCE_LEN);
959 pos += WPA_NONCE_LEN;
960 os_memcpy(pos, anonce, WPA_NONCE_LEN);
961 pos += WPA_NONCE_LEN;
962 os_memcpy(pos, bssid, ETH_ALEN);
964 os_memcpy(pos, sta_addr, ETH_ALEN);
967 ptk->kck_len = wpa_kck_len(akmp);
968 ptk->kek_len = wpa_kek_len(akmp);
969 ptk->tk_len = wpa_cipher_key_len(cipher);
970 ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len;
972 sha256_prf(pmk_r1, PMK_LEN, "FT-PTK", buf, pos - buf, tmp, ptk_len);
975 * PTKName = Truncate-128(SHA-256(PMKR1Name || "FT-PTKN" || SNonce ||
976 * ANonce || BSSID || STA-ADDR))
978 addr[0] = pmk_r1_name;
979 len[0] = WPA_PMK_NAME_LEN;
980 addr[1] = (const u8 *) "FT-PTKN";
983 len[2] = WPA_NONCE_LEN;
985 len[3] = WPA_NONCE_LEN;
991 sha256_vector(6, addr, len, hash);
992 os_memcpy(ptk_name, hash, WPA_PMK_NAME_LEN);
994 os_memcpy(ptk->kck, tmp, ptk->kck_len);
995 os_memcpy(ptk->kek, tmp + ptk->kck_len, ptk->kek_len);
996 os_memcpy(ptk->tk, tmp + ptk->kck_len + ptk->kek_len, ptk->tk_len);
998 wpa_hexdump_key(MSG_DEBUG, "FT: KCK", ptk->kck, ptk->kck_len);
999 wpa_hexdump_key(MSG_DEBUG, "FT: KEK", ptk->kek, ptk->kek_len);
1000 wpa_hexdump_key(MSG_DEBUG, "FT: TK", ptk->tk, ptk->tk_len);
1001 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
1003 os_memset(tmp, 0, sizeof(tmp));
1008 #endif /* CONFIG_IEEE80211R */
1012 * rsn_pmkid - Calculate PMK identifier
1013 * @pmk: Pairwise master key
1014 * @pmk_len: Length of pmk in bytes
1015 * @aa: Authenticator address
1016 * @spa: Supplicant address
1017 * @pmkid: Buffer for PMKID
1018 * @use_sha256: Whether to use SHA256-based KDF
1020 * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
1021 * PMKID = HMAC-SHA1-128(PMK, "PMK Name" || AA || SPA)
1023 void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa,
1024 u8 *pmkid, int use_sha256)
1026 char *title = "PMK Name";
1028 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
1029 unsigned char hash[SHA256_MAC_LEN];
1031 addr[0] = (u8 *) title;
1035 #ifdef CONFIG_IEEE80211W
1037 hmac_sha256_vector(pmk, pmk_len, 3, addr, len, hash);
1039 #endif /* CONFIG_IEEE80211W */
1040 hmac_sha1_vector(pmk, pmk_len, 3, addr, len, hash);
1041 os_memcpy(pmkid, hash, PMKID_LEN);
1045 #ifdef CONFIG_SUITEB
1047 * rsn_pmkid_suite_b - Calculate PMK identifier for Suite B AKM
1048 * @kck: Key confirmation key
1049 * @kck_len: Length of kck in bytes
1050 * @aa: Authenticator address
1051 * @spa: Supplicant address
1052 * @pmkid: Buffer for PMKID
1053 * Returns: 0 on success, -1 on failure
1055 * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy
1056 * PMKID = Truncate(HMAC-SHA-256(KCK, "PMK Name" || AA || SPA))
1058 int rsn_pmkid_suite_b(const u8 *kck, size_t kck_len, const u8 *aa,
1059 const u8 *spa, u8 *pmkid)
1061 char *title = "PMK Name";
1063 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
1064 unsigned char hash[SHA256_MAC_LEN];
1066 addr[0] = (u8 *) title;
1070 if (hmac_sha256_vector(kck, kck_len, 3, addr, len, hash) < 0)
1072 os_memcpy(pmkid, hash, PMKID_LEN);
1075 #endif /* CONFIG_SUITEB */
1078 #ifdef CONFIG_SUITEB192
1080 * rsn_pmkid_suite_b_192 - Calculate PMK identifier for Suite B AKM
1081 * @kck: Key confirmation key
1082 * @kck_len: Length of kck in bytes
1083 * @aa: Authenticator address
1084 * @spa: Supplicant address
1085 * @pmkid: Buffer for PMKID
1086 * Returns: 0 on success, -1 on failure
1088 * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy
1089 * PMKID = Truncate(HMAC-SHA-384(KCK, "PMK Name" || AA || SPA))
1091 int rsn_pmkid_suite_b_192(const u8 *kck, size_t kck_len, const u8 *aa,
1092 const u8 *spa, u8 *pmkid)
1094 char *title = "PMK Name";
1096 const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
1097 unsigned char hash[SHA384_MAC_LEN];
1099 addr[0] = (u8 *) title;
1103 if (hmac_sha384_vector(kck, kck_len, 3, addr, len, hash) < 0)
1105 os_memcpy(pmkid, hash, PMKID_LEN);
1108 #endif /* CONFIG_SUITEB192 */
1112 * wpa_cipher_txt - Convert cipher suite to a text string
1113 * @cipher: Cipher suite (WPA_CIPHER_* enum)
1114 * Returns: Pointer to a text string of the cipher suite name
1116 const char * wpa_cipher_txt(int cipher)
1119 case WPA_CIPHER_NONE:
1121 case WPA_CIPHER_WEP40:
1123 case WPA_CIPHER_WEP104:
1125 case WPA_CIPHER_TKIP:
1127 case WPA_CIPHER_CCMP:
1129 case WPA_CIPHER_CCMP | WPA_CIPHER_TKIP:
1131 case WPA_CIPHER_GCMP:
1133 case WPA_CIPHER_GCMP_256:
1135 case WPA_CIPHER_CCMP_256:
1137 case WPA_CIPHER_GTK_NOT_USED:
1138 return "GTK_NOT_USED";
1146 * wpa_key_mgmt_txt - Convert key management suite to a text string
1147 * @key_mgmt: Key management suite (WPA_KEY_MGMT_* enum)
1148 * @proto: WPA/WPA2 version (WPA_PROTO_*)
1149 * Returns: Pointer to a text string of the key management suite name
1151 const char * wpa_key_mgmt_txt(int key_mgmt, int proto)
1154 case WPA_KEY_MGMT_IEEE8021X:
1155 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
1156 return "WPA2+WPA/IEEE 802.1X/EAP";
1157 return proto == WPA_PROTO_RSN ?
1158 "WPA2/IEEE 802.1X/EAP" : "WPA/IEEE 802.1X/EAP";
1159 case WPA_KEY_MGMT_PSK:
1160 if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
1161 return "WPA2-PSK+WPA-PSK";
1162 return proto == WPA_PROTO_RSN ?
1163 "WPA2-PSK" : "WPA-PSK";
1164 case WPA_KEY_MGMT_NONE:
1166 case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
1167 return "IEEE 802.1X (no WPA)";
1168 #ifdef CONFIG_IEEE80211R
1169 case WPA_KEY_MGMT_FT_IEEE8021X:
1171 case WPA_KEY_MGMT_FT_PSK:
1173 #endif /* CONFIG_IEEE80211R */
1174 #ifdef CONFIG_IEEE80211W
1175 case WPA_KEY_MGMT_IEEE8021X_SHA256:
1176 return "WPA2-EAP-SHA256";
1177 case WPA_KEY_MGMT_PSK_SHA256:
1178 return "WPA2-PSK-SHA256";
1179 #endif /* CONFIG_IEEE80211W */
1180 case WPA_KEY_MGMT_WPS:
1182 case WPA_KEY_MGMT_SAE:
1184 case WPA_KEY_MGMT_FT_SAE:
1186 case WPA_KEY_MGMT_OSEN:
1188 case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
1189 return "WPA2-EAP-SUITE-B";
1190 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
1191 return "WPA2-EAP-SUITE-B-192";
1198 u32 wpa_akm_to_suite(int akm)
1200 if (akm & WPA_KEY_MGMT_FT_IEEE8021X)
1201 return WLAN_AKM_SUITE_FT_8021X;
1202 if (akm & WPA_KEY_MGMT_FT_PSK)
1203 return WLAN_AKM_SUITE_FT_PSK;
1204 if (akm & WPA_KEY_MGMT_IEEE8021X)
1205 return WLAN_AKM_SUITE_8021X;
1206 if (akm & WPA_KEY_MGMT_IEEE8021X_SHA256)
1207 return WLAN_AKM_SUITE_8021X_SHA256;
1208 if (akm & WPA_KEY_MGMT_IEEE8021X)
1209 return WLAN_AKM_SUITE_8021X;
1210 if (akm & WPA_KEY_MGMT_PSK_SHA256)
1211 return WLAN_AKM_SUITE_PSK_SHA256;
1212 if (akm & WPA_KEY_MGMT_PSK)
1213 return WLAN_AKM_SUITE_PSK;
1214 if (akm & WPA_KEY_MGMT_CCKM)
1215 return WLAN_AKM_SUITE_CCKM;
1216 if (akm & WPA_KEY_MGMT_OSEN)
1217 return WLAN_AKM_SUITE_OSEN;
1218 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B)
1219 return WLAN_AKM_SUITE_8021X_SUITE_B;
1220 if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192)
1221 return WLAN_AKM_SUITE_8021X_SUITE_B_192;
1226 int wpa_compare_rsn_ie(int ft_initial_assoc,
1227 const u8 *ie1, size_t ie1len,
1228 const u8 *ie2, size_t ie2len)
1230 if (ie1 == NULL || ie2 == NULL)
1233 if (ie1len == ie2len && os_memcmp(ie1, ie2, ie1len) == 0)
1234 return 0; /* identical IEs */
1236 #ifdef CONFIG_IEEE80211R
1237 if (ft_initial_assoc) {
1238 struct wpa_ie_data ie1d, ie2d;
1240 * The PMKID-List in RSN IE is different between Beacon/Probe
1241 * Response/(Re)Association Request frames and EAPOL-Key
1242 * messages in FT initial mobility domain association. Allow
1243 * for this, but verify that other parts of the RSN IEs are
1246 if (wpa_parse_wpa_ie_rsn(ie1, ie1len, &ie1d) < 0 ||
1247 wpa_parse_wpa_ie_rsn(ie2, ie2len, &ie2d) < 0)
1249 if (ie1d.proto == ie2d.proto &&
1250 ie1d.pairwise_cipher == ie2d.pairwise_cipher &&
1251 ie1d.group_cipher == ie2d.group_cipher &&
1252 ie1d.key_mgmt == ie2d.key_mgmt &&
1253 ie1d.capabilities == ie2d.capabilities &&
1254 ie1d.mgmt_group_cipher == ie2d.mgmt_group_cipher)
1257 #endif /* CONFIG_IEEE80211R */
1263 #ifdef CONFIG_IEEE80211R
1264 int wpa_insert_pmkid(u8 *ies, size_t ies_len, const u8 *pmkid)
1266 u8 *start, *end, *rpos, *rend;
1270 end = ies + ies_len;
1272 while (start < end) {
1273 if (*start == WLAN_EID_RSN)
1275 start += 2 + start[1];
1278 wpa_printf(MSG_ERROR, "FT: Could not find RSN IE in "
1282 wpa_hexdump(MSG_DEBUG, "FT: RSN IE before modification",
1283 start, 2 + start[1]);
1285 /* Find start of PMKID-Count */
1287 rend = rpos + start[1];
1289 /* Skip Version and Group Data Cipher Suite */
1291 /* Skip Pairwise Cipher Suite Count and List */
1292 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
1293 /* Skip AKM Suite Count and List */
1294 rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
1297 /* Add RSN Capabilities */
1298 os_memmove(rpos + 2, rpos, end - rpos);
1305 /* Skip RSN Capabilities */
1308 wpa_printf(MSG_ERROR, "FT: Could not parse RSN IE in "
1315 /* No PMKID-Count field included; add it */
1316 os_memmove(rpos + 2 + PMKID_LEN, rpos, end + added - rpos);
1317 WPA_PUT_LE16(rpos, 1);
1319 os_memcpy(rpos, pmkid, PMKID_LEN);
1320 added += 2 + PMKID_LEN;
1321 start[1] += 2 + PMKID_LEN;
1323 /* PMKID-Count was included; use it */
1324 if (WPA_GET_LE16(rpos) != 0) {
1325 wpa_printf(MSG_ERROR, "FT: Unexpected PMKID "
1326 "in RSN IE in EAPOL-Key data");
1329 WPA_PUT_LE16(rpos, 1);
1331 os_memmove(rpos + PMKID_LEN, rpos, end + added - rpos);
1332 os_memcpy(rpos, pmkid, PMKID_LEN);
1334 start[1] += PMKID_LEN;
1337 wpa_hexdump(MSG_DEBUG, "FT: RSN IE after modification "
1338 "(PMKID inserted)", start, 2 + start[1]);
1342 #endif /* CONFIG_IEEE80211R */
1345 int wpa_cipher_key_len(int cipher)
1348 case WPA_CIPHER_CCMP_256:
1349 case WPA_CIPHER_GCMP_256:
1350 case WPA_CIPHER_BIP_GMAC_256:
1351 case WPA_CIPHER_BIP_CMAC_256:
1353 case WPA_CIPHER_CCMP:
1354 case WPA_CIPHER_GCMP:
1355 case WPA_CIPHER_AES_128_CMAC:
1356 case WPA_CIPHER_BIP_GMAC_128:
1358 case WPA_CIPHER_TKIP:
1366 int wpa_cipher_rsc_len(int cipher)
1369 case WPA_CIPHER_CCMP_256:
1370 case WPA_CIPHER_GCMP_256:
1371 case WPA_CIPHER_CCMP:
1372 case WPA_CIPHER_GCMP:
1373 case WPA_CIPHER_TKIP:
1381 int wpa_cipher_to_alg(int cipher)
1384 case WPA_CIPHER_CCMP_256:
1385 return WPA_ALG_CCMP_256;
1386 case WPA_CIPHER_GCMP_256:
1387 return WPA_ALG_GCMP_256;
1388 case WPA_CIPHER_CCMP:
1389 return WPA_ALG_CCMP;
1390 case WPA_CIPHER_GCMP:
1391 return WPA_ALG_GCMP;
1392 case WPA_CIPHER_TKIP:
1393 return WPA_ALG_TKIP;
1394 case WPA_CIPHER_AES_128_CMAC:
1395 return WPA_ALG_IGTK;
1396 case WPA_CIPHER_BIP_GMAC_128:
1397 return WPA_ALG_BIP_GMAC_128;
1398 case WPA_CIPHER_BIP_GMAC_256:
1399 return WPA_ALG_BIP_GMAC_256;
1400 case WPA_CIPHER_BIP_CMAC_256:
1401 return WPA_ALG_BIP_CMAC_256;
1403 return WPA_ALG_NONE;
1407 int wpa_cipher_valid_pairwise(int cipher)
1409 return cipher == WPA_CIPHER_CCMP_256 ||
1410 cipher == WPA_CIPHER_GCMP_256 ||
1411 cipher == WPA_CIPHER_CCMP ||
1412 cipher == WPA_CIPHER_GCMP ||
1413 cipher == WPA_CIPHER_TKIP;
1417 u32 wpa_cipher_to_suite(int proto, int cipher)
1419 if (cipher & WPA_CIPHER_CCMP_256)
1420 return RSN_CIPHER_SUITE_CCMP_256;
1421 if (cipher & WPA_CIPHER_GCMP_256)
1422 return RSN_CIPHER_SUITE_GCMP_256;
1423 if (cipher & WPA_CIPHER_CCMP)
1424 return (proto == WPA_PROTO_RSN ?
1425 RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
1426 if (cipher & WPA_CIPHER_GCMP)
1427 return RSN_CIPHER_SUITE_GCMP;
1428 if (cipher & WPA_CIPHER_TKIP)
1429 return (proto == WPA_PROTO_RSN ?
1430 RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
1431 if (cipher & WPA_CIPHER_NONE)
1432 return (proto == WPA_PROTO_RSN ?
1433 RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
1434 if (cipher & WPA_CIPHER_GTK_NOT_USED)
1435 return RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED;
1436 if (cipher & WPA_CIPHER_AES_128_CMAC)
1437 return RSN_CIPHER_SUITE_AES_128_CMAC;
1438 if (cipher & WPA_CIPHER_BIP_GMAC_128)
1439 return RSN_CIPHER_SUITE_BIP_GMAC_128;
1440 if (cipher & WPA_CIPHER_BIP_GMAC_256)
1441 return RSN_CIPHER_SUITE_BIP_GMAC_256;
1442 if (cipher & WPA_CIPHER_BIP_CMAC_256)
1443 return RSN_CIPHER_SUITE_BIP_CMAC_256;
1448 int rsn_cipher_put_suites(u8 *start, int ciphers)
1452 if (ciphers & WPA_CIPHER_CCMP_256) {
1453 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP_256);
1454 pos += RSN_SELECTOR_LEN;
1456 if (ciphers & WPA_CIPHER_GCMP_256) {
1457 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP_256);
1458 pos += RSN_SELECTOR_LEN;
1460 if (ciphers & WPA_CIPHER_CCMP) {
1461 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
1462 pos += RSN_SELECTOR_LEN;
1464 if (ciphers & WPA_CIPHER_GCMP) {
1465 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP);
1466 pos += RSN_SELECTOR_LEN;
1468 if (ciphers & WPA_CIPHER_TKIP) {
1469 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
1470 pos += RSN_SELECTOR_LEN;
1472 if (ciphers & WPA_CIPHER_NONE) {
1473 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE);
1474 pos += RSN_SELECTOR_LEN;
1477 return (pos - start) / RSN_SELECTOR_LEN;
1481 int wpa_cipher_put_suites(u8 *start, int ciphers)
1485 if (ciphers & WPA_CIPHER_CCMP) {
1486 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
1487 pos += WPA_SELECTOR_LEN;
1489 if (ciphers & WPA_CIPHER_TKIP) {
1490 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
1491 pos += WPA_SELECTOR_LEN;
1493 if (ciphers & WPA_CIPHER_NONE) {
1494 RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE);
1495 pos += WPA_SELECTOR_LEN;
1498 return (pos - start) / RSN_SELECTOR_LEN;
1502 int wpa_pick_pairwise_cipher(int ciphers, int none_allowed)
1504 if (ciphers & WPA_CIPHER_CCMP_256)
1505 return WPA_CIPHER_CCMP_256;
1506 if (ciphers & WPA_CIPHER_GCMP_256)
1507 return WPA_CIPHER_GCMP_256;
1508 if (ciphers & WPA_CIPHER_CCMP)
1509 return WPA_CIPHER_CCMP;
1510 if (ciphers & WPA_CIPHER_GCMP)
1511 return WPA_CIPHER_GCMP;
1512 if (ciphers & WPA_CIPHER_TKIP)
1513 return WPA_CIPHER_TKIP;
1514 if (none_allowed && (ciphers & WPA_CIPHER_NONE))
1515 return WPA_CIPHER_NONE;
1520 int wpa_pick_group_cipher(int ciphers)
1522 if (ciphers & WPA_CIPHER_CCMP_256)
1523 return WPA_CIPHER_CCMP_256;
1524 if (ciphers & WPA_CIPHER_GCMP_256)
1525 return WPA_CIPHER_GCMP_256;
1526 if (ciphers & WPA_CIPHER_CCMP)
1527 return WPA_CIPHER_CCMP;
1528 if (ciphers & WPA_CIPHER_GCMP)
1529 return WPA_CIPHER_GCMP;
1530 if (ciphers & WPA_CIPHER_GTK_NOT_USED)
1531 return WPA_CIPHER_GTK_NOT_USED;
1532 if (ciphers & WPA_CIPHER_TKIP)
1533 return WPA_CIPHER_TKIP;
1538 int wpa_parse_cipher(const char *value)
1541 char *start, *end, *buf;
1543 buf = os_strdup(value);
1548 while (*start != '\0') {
1549 while (*start == ' ' || *start == '\t')
1554 while (*end != ' ' && *end != '\t' && *end != '\0')
1556 last = *end == '\0';
1558 if (os_strcmp(start, "CCMP-256") == 0)
1559 val |= WPA_CIPHER_CCMP_256;
1560 else if (os_strcmp(start, "GCMP-256") == 0)
1561 val |= WPA_CIPHER_GCMP_256;
1562 else if (os_strcmp(start, "CCMP") == 0)
1563 val |= WPA_CIPHER_CCMP;
1564 else if (os_strcmp(start, "GCMP") == 0)
1565 val |= WPA_CIPHER_GCMP;
1566 else if (os_strcmp(start, "TKIP") == 0)
1567 val |= WPA_CIPHER_TKIP;
1568 else if (os_strcmp(start, "WEP104") == 0)
1569 val |= WPA_CIPHER_WEP104;
1570 else if (os_strcmp(start, "WEP40") == 0)
1571 val |= WPA_CIPHER_WEP40;
1572 else if (os_strcmp(start, "NONE") == 0)
1573 val |= WPA_CIPHER_NONE;
1574 else if (os_strcmp(start, "GTK_NOT_USED") == 0)
1575 val |= WPA_CIPHER_GTK_NOT_USED;
1591 int wpa_write_ciphers(char *start, char *end, int ciphers, const char *delim)
1596 if (ciphers & WPA_CIPHER_CCMP_256) {
1597 ret = os_snprintf(pos, end - pos, "%sCCMP-256",
1598 pos == start ? "" : delim);
1599 if (os_snprintf_error(end - pos, ret))
1603 if (ciphers & WPA_CIPHER_GCMP_256) {
1604 ret = os_snprintf(pos, end - pos, "%sGCMP-256",
1605 pos == start ? "" : delim);
1606 if (os_snprintf_error(end - pos, ret))
1610 if (ciphers & WPA_CIPHER_CCMP) {
1611 ret = os_snprintf(pos, end - pos, "%sCCMP",
1612 pos == start ? "" : delim);
1613 if (os_snprintf_error(end - pos, ret))
1617 if (ciphers & WPA_CIPHER_GCMP) {
1618 ret = os_snprintf(pos, end - pos, "%sGCMP",
1619 pos == start ? "" : delim);
1620 if (os_snprintf_error(end - pos, ret))
1624 if (ciphers & WPA_CIPHER_TKIP) {
1625 ret = os_snprintf(pos, end - pos, "%sTKIP",
1626 pos == start ? "" : delim);
1627 if (os_snprintf_error(end - pos, ret))
1631 if (ciphers & WPA_CIPHER_NONE) {
1632 ret = os_snprintf(pos, end - pos, "%sNONE",
1633 pos == start ? "" : delim);
1634 if (os_snprintf_error(end - pos, ret))
1643 int wpa_select_ap_group_cipher(int wpa, int wpa_pairwise, int rsn_pairwise)
1647 /* Select group cipher based on the enabled pairwise cipher suites */
1649 pairwise |= wpa_pairwise;
1651 pairwise |= rsn_pairwise;
1653 if (pairwise & WPA_CIPHER_TKIP)
1654 return WPA_CIPHER_TKIP;
1655 if ((pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP)
1656 return WPA_CIPHER_GCMP;
1657 if ((pairwise & (WPA_CIPHER_GCMP_256 | WPA_CIPHER_CCMP |
1658 WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP_256)
1659 return WPA_CIPHER_GCMP_256;
1660 if ((pairwise & (WPA_CIPHER_CCMP_256 | WPA_CIPHER_CCMP |
1661 WPA_CIPHER_GCMP)) == WPA_CIPHER_CCMP_256)
1662 return WPA_CIPHER_CCMP_256;
1663 return WPA_CIPHER_CCMP;